1. Select the correct statement(s)–
1. Common cold is caused by Rhino Virus that infects nose and respiratory
passage.
2. Rhino Virus also infects lungs leading to respiratory infection.
3. Infection of alveoli of lungs causes pneumonia.
(A) 1 and 2 (B) 2 and 3
(C) 1 and 3 (D) All of these See Answer:

2. Consider the following statements–
1. Abscisic acid stimulates closure of stomata leading to reduced moisture loss.
2. Ethylene causes ripening of fruits.
Which of the following statements is/are correct?
(A) 1 only (B) 2 only
(C) Both 1 and 2 (D) Neither 1 nor 2 See Answer:

3. A chronic disorder where respiratory surface is decreased due to damage of
alveolar walls commonly found in smokers is–
(A) Odema (B) Emphysema
(C) Pneumonia (D) None of these See Answer:

4. Which of the following is carcinogenic?
(A) Hydrocarbons (B) Carbon monoxide
(C) Nitrous oxide (D) Nitric oxide See Answer:

6. German Silver is an alloy that consists of copper, zinc and–
(A) Nickel (B) Tin
(C) Lead (D) Chromium See Answer:

7. Consider the following statements–
1. Glass and cements are man-made silicates.
2. Silica gel is used as a drying agent.
Which of the above statements is/are correct?
(A) 1 only (B) 2 only
(C) Both 1 and 2 (D) Neither 1 nor 2 See Answer:

9. Which of the following does not produce hormone?
(A) Heart (B) Kidney
(C) Gastro-intestinal tract (D) None of these See Answer:

10. Consider the following statements–
1. Potassium hydroxide is used in the manufacture of soap.
2. Calcium is used in devising Photoelectric Cells.
Which of the above statements is/are correct?
(A) 1 only (B) 2 only
(C) 1 and 2 both (D) Neither 1 nor 2 See Answer:

11. Consider the following statements–
1. Specially precipitated calcium carbonate is used in manufacture of
high-quality paper.
2. Calcium hydroxide is used in purification of sugar.
Which of the above statements is/are correct?
(A) 1 only (B) 2 only
(C) Both 1 and 2 (D) Neither 1 nor 2 See Answer:

12. With reference to blood and its composition, consider the following
statements–
1. Blood contains fluid matrix, plasma and formed elements.
2. Plasma without the clotting factors is called Serum.
3. Fibrinogen promotes coagulation of blood.
(A) 1 and 2 (B) 2 and 3
(C) 3 only (D) All of these See Answer:

13. Which of the following is not an endocrine gland?
(A) Pituitary gland (B) Pancreas
(C) Pineal gland (D) None of these See Answer:

14. Consider the following statements–
1. Inflammation of joints is caused due to accumulation of uric acid.
2. Calcium ion plays a very important role in clotting of blood.
Which of the above statements is/are correct.
(A) 1 only (B) 2 only
(C) 1 and 2 both (D) Neither 1 nor 2 See Answer:

15. Which of the following statements is/are true?
1. The level of water increases when ice floating in a water tank melts.
2. Density of water decreases if water contracts on freezing.
(A) 1 only (B) 2 only
(C) Both 1 and 2 (D) Neither 1 nor 2 See Answer:

16. Which of the following statements is/are correct?
1. Both the light and sound waves exhibit interference.
2. Convection current from the sun leads to heating of earth's outer atmosphere.
(A) 1 only (B) 2 only
(C) 1 and 2 both (D) Neither 1 nor 2 See Answer:

17. The density of water is maximum at 4°C. Such chemical property of water
leads to–
(A) continuous availability of ice floating on sea surface.
(B) sustenance of marine life even during harsh winter.
(C) reduced heat loss from the surface of the sea
(D) None of these See Answer:

18. Select the incorrect statement(s)–
1. The list of endangered plants and animals is contained in ''Yellow Data
Book."
2. ''Yellow Data Book" is published by United Nations Organisation.
(A) 1 only (B) 2 only
(C) Both 1 and 2 (D) Neither 1 nor 2 See Answer:

19. Operating principle of optical fibres which are used in endoscopes and
telecommunications is based on–
(A) Refraction (B) Critical angle
(C) Total internal reflection (D) Refractive index See Answer:

20. Consider the following statements with reference to Polyols–
1. It is a sugar alcohol commonly added to foods because of its lower calorific
content than sugars.
2. Polyols are added to chewing gum because they are not broken down by bacteria
and thus do not contribute to tooth decay.
Which of the above statements is/are correct?
(A) 1 only (B) 2 only
(C) Both 1 and 2 (D) Neither 1 nor 2 See Answer: